Printer slotter



Feb. 27, 1940. H. B. GREENWOOD 2,191,988

PRINTER SLOTTER Filed March 8; 1958 a Sheets-Sheet 1 3 Sheets-Sheet 2 PRINTER SLOTTER H. B. GREENWOOD Filed March 8, 1958 Feb. 27, 1940.

Feb. 27, 1940.

H. B. GREENWOOD PRIiITER SLOTTER Filed March 8, 1938 3 Sheets-Sheet 3 Patented Feb. 27, 1940 UNITED STATES PRINTER sm'rma Henry B. Greenwood, Glen Arm, Md., assignor to F. X. Hooper Company, Inc., Glen Arm, Md., a corporation of Maryland Application March 8, 1938, Serial No. 194,660

7 Claims. (Cl. 93-582) The invention relates to printer slotters used for printing and slotting carton blanks, which are usually of double-faced corrugated board and the like.

On account of the demand for machines of increased capacity, the operating speeds have been greatly increased, and, likewise, the number of blanks supported on the machine for feeding, and hence the weight of the pile of blanks.sup-

10 ported at the feed end of the machine for this purpose. These blanks, in accordance with the existing practice, are previously cut to the desired lengths and are fed to the printer slotter by a reciprocating feed, which, on account of the high speeds of the new machines, operates at correspondingly high speeds to impart .to each blank an acceleration from no speed to approximately 1,000 .feet per minute, which is the approximate speed of the blanks through the machine.

The reciprocating feed, in this operation, moves at a speed of approximately 500 revolutions per minute, giving a destructive vibration which has required extremely heavy and expensive construction; also the pressure rolls, in order to apply the pressures necessary to grasp the blanks and give the desired acceleration and also to pass them. through the printing and slotting rolls, are required to operate at correspondingly high pressures.

To adapt the machine to different thicknesses of corrugated board, or other materials which may be employed, it is necessary to provide an adjustment of the pressure rolls, for which purpose the frames have been slotted, the rolls being supported upon sliding blocks which ride in the slots and carry the bearings of the roll shafts, which bearings have been adjusted along the slots for the purpose stated. This slotting of the frames has been found to remove so much of the material essential to the support of the rollers. that the remaining portions of the frame were necessarily made of excessive thickness to give adequate support to resist the excessive pres sures, the weight of the stack of blanks, and the high speed vibration of the essentially heavy reciprocating feeder members. In fact, failure cannot always be avoided even with the heavy, expensive construction provided.

An important object of the present invention is to provide for the adjustment of the rollers to accommodate the machine to different thicknesses of the material, and, at the same time, 5' to avoid the slotting of the frames which is incident to the adjustment of the hearings in the manner described.

It has been previously suggested that the bearings of adjustable rolls be mounted on eccentric supports within the frame, which eccentric sup- 5 ports are rotated to give the desired adjustment. The difliculty with this arrangement is that the driving gears, being mounted on the roll shafts, are moved relatively to the driven gears, and vice-versa, which results in a shifting of the in line of contact of the gears, which, in turn, results in a grinding noise due to excess friction. This results in loss of power and also tends to reduce the life of the gears, in addition to the noise which tires the workers and interferes with 15 the efficiency of shop operation.

-A further object of the present invention is to provide for the shifting of the rollers in the adjustment of the machine to different thicknesses of material, which not only avoids slotting the frame, but also avoids shifting the gears relatively to each other, and hence avoids the change of contact with the consequent grinding action, excess friction, loss of driving eificiency, and the destructive tendency above mentioned.

The invention also provides for the adjustment of both ends of the rollers uniformly and simultaneously-an important advantage of the present construction being that a uniform angular relation of the rolls to and with the gears by W which they are driven is maintained even though the centres of the rolls are shifted relatively to these gears in making the adjustment, and with the normal uniform speed of the drive maintains the uniform angular speed of the rollers, which is essential to satisfactory operation of the machine.

To avoid excess friction and overloading of the connection between the driving gear of each roller and the shaft member on which the roll is mounted, the machine is, in the preferred form of the invention, so arranged that each adjustable roller is at the outer, or driven end, of a separate train of driving gears for the pair of rollers of which the adjustable roller is a member, no load in excess of that necessary to the useful operation of each adjustable roller being applied to the connections from the drive gear of that roller to the roller. While this principle of arrangement is of importance, strict compliance with it, in all instances, is not essential to the practice of the invention in all its various forms, combinations and arrangements.

In the accompanying drawings, I have illus- 5 trated so much of a printer slotter, embodying the features of the invention in the preferred form, as is necessary to a full understanding of the manner of constructing, operating and using the invention.

In the drawings:

Fig. 1 is a side elevation of the printer slotter, the gears and the rollers, being shown in elevation; the view being taken from the left side of the machine as seen from the front, i. e., from the in-feed end.

Fig. 2 is a vertical section on the line 2-2 in Fig. 1, looking to the rear, 1. e., in the direction of motion of the blanks as they pass through the machine.

Fig. 3 is a section on the line 3-3 in Fig. 2, looking to the right in said figure.

Fig. 4 is a fragmentary view of the feed.

Referring to the drawings by numerals. each of which is used to indicate the same, or similar parts in the different figures, the construction shown comprises right and left hand side frames I and 2, driving gears at left referred to in a general way by reference character 3, and caps 4, which overlie the driving gears, and a series of rollers which operate on the blanks in a manner to be more fully described.

Referring more particularly to Fig. 1, the cut blanks, shown fragmentarily at II", are supported at the front of the machine on a feed table II' of a well-known type, to be further described.

The reciprocating feed referred to is operated by the crank gear 6, the reciprocating feed mechanism being fragmentarily shown in connection therewith.

The machine is driven by means of a belt I which engages a pulley 8 near the front of the machine, and mounted on the front lower pull roller shaft 9, the belt being operated from a source of power not shown. The front lower pull roller I6 is also mounted on this shaft. The shaft 9 also carries a drive gear II which meshes with the crank gear 6 and drives the same, and also meshes with and drives an upper pull roller gear l2 on the upper pull roller shaft l4. The front pull rollers, or, particularly, the upper pull roller I0 is made adjustable toward and from the lower pull roller to provide for different thicknesses of material, in a manner to be more fully described in connection with the second set of pull rollers.

The blanks, H" otherwise referred to as the material, are advanced through the machine in a substantially horizontal plane, the grip of the first set of printing cylinders being immediately forward of the grip of the first set of pull rollers. l0 and i0 and in substantially the same plane. The first, or forward, printing cylinder l5 has a driving gear 24, which drives this cylinder l5 and the gears I1 and I8 which have associated with them in driving relation, the usual inking rollers l 9, which need not be described. The lower front impression cylinder, or platen 20 which cooperates with the cylinder. I5, is mounted on a shaft 2|, which carries, connected thereto, a platen gear 22. This gear meshes with the printing cylinder gear 24 and drives the same, the impression cylinder gear 22 being driven from the crank gear 6. The impression cylinder 20 is provided with an adjustment at 25 similar to that to be more specifically described in connection with the second set of pull rollers.

The printing cylinder gear 24 meshes with and drives-an idler, or transmission gear, 26, which meshes with and drives a gear 21 on the shaft of the upper pull roller 28-the shaft being indicated by reference character 29, and this gear, in turn, meshes with and drives a. gear 30 on the shaft 3| of the lower roller 32, of the second set of pull rollers; the roller 28 being the upper roller of said second set. The lower roller 32 of said second set is adjustable by the adjusting mechanism 25', to be further and more fully described.

In order to provide for printing box blanks in more than one color, a plurality of sets of printing cylinders is provided. In this instance, there are two sets for printing in two colors. The second printing cylinder immediately beyond the second set of pull rollers, is indicated by reference character 35. This printing cylinder 35 is provided with inking rollers 36, operated by gears 31, which need not be further described, being similar to those shown in connection with the first printing cylinder, and also well-known.

The printing cylinder 35 is provided with a printing cylinder gear 36 which rotates therewith and drives the ink roller gears 31, being driven by the idler, or transmission gear, 26. The printing cylinder gear 36, which drives the cylinder 35 also meshes with and drives a gear 38 on the shaft 34 of the impression cylinder 39. This impression cylinder 39 cooperates with printing cylinder 35. Impression cylinder 39 is provided with an adjustment 25", which is precisely simflar to the adjustment 25' shown in connection with the second set of pull rollers, and to be more specifically described.

The printing cylinder gear 36 meshes with and drives an idler, or transmission, gear 40 to the rear of the same, which gear, in turn, meshes with a gear 42 on the shaft 44 of the upper roller 43 of the third set of pull rollers, which gear 42 in turn meshes with a gear 45 on the shaft 46 of the lower pull roller 41, whereby the latter is driven, both pull rollers of the third set of pull rollers being operated through the train of gearing just described. The lower pull roller 41 is adjustable in a vertical direction toward and from the upper pull roller 43 by an adjustment 25", to be further described.

Beyond the third set of pull rollers just described, is a set, or pair, of slotting rollers, which cut the usual slots in the blank whereby the top and bottom flaps are provided. Of these, the upper, or male, slotting roller is indicated by reference character 48, the same being provided with the usual male cutters, or knives 49, and the lower, or female, slotting roller, provided with cooperating female cutters not shown, is indicated by reference character 50. The upper male slotting roller 48 is provided with a gear 5|, which rotates therewith and drives the roller, being engaged and driven by the idler, or transmission gear 40. This gear 5| also meshes with and drives a gear 52 connected to the shaft 53 of the lower, or female, slotting roller 50, whereby the latter'is driven. The slotting operation being well understood, need not be described.

The lower, or'female, slotting roller 56 is adjustable up and down toward and from male slotting roller 43 to provide for blanks of different thicknesses, by an adjusting mechanism 25"", to be more fully described in connection with the adjusting mechanism 25' of the second set of pull rollers.

Beyond the slotting rollers 48 and 50 is still another set, or pair, of rollers, which perform the scoring function which is usual in this type of 76 machine: the rollers being of the usual construction.

The upper scoring roller is indicated by reference character 55 and it is provided with a toothed gear 56 in driving relation thereto. This gear 56 is engaged and driven by an idler, or transmission, gear 51, which, in turn, meshes with and is driven from the male slotting roller gear The gear- 56 on the upper scoring roller 55 meshes with and drives a gear 66 connected in driving relation to the lower scoring roller shaft 6|, on which the lower scoring roller is mounted. and by which it is driven from said shaft. The lower scoring roller 62 is adjustable toward and from the upper scoring roller to accommodate blanks, otherwise referred to herein as material, of different thicknesses, by means of an adjustment 25"", which is substantially similar to the adjustment 25' already identified and to be further hereinafter described.

As in the preferred construction shown, the entire set of rollers is driven from the gear it on the shaft iii of the lower pull roller of the first set of pull rollers, the adjustment for the first set of pull rollers is to avoid excess load on the adjustable connections provided, as indicated by reference character 65', in connection with the upper pull roller shaft M.

It is of interest that the drive of the entire set of rollers is preferably on one side of the machine, being so arranged that each adjustable roller and cylinder is separately driven and transmits no driving torque to other members so that there is no extra load on the shaft by which it is carried; in other words, the shaft of each adjustable roller is driven from a connection 9691, to be described, which serves the sole function of driving its adjustable roller. This avoids the placing of any unnecessary load on the connection, to be described, which provides for the adjustment 25',

previously referred to.

In further development of this idea, it will be noted that the second set of pull rollers, 28 and 32, are driven from above by way of the gear 26. While the first printing cylinder I5 is driven from the gear 22 on impression cylinder 28, which is adjustable, there is no member driven from the opposite end of this cylinder and no excess load on the driving connection to said cylinder. The second impression cylinder 39, which is adjustable, is driven, through its gear 38 from the gear 36 of printing cylinder 35. It will also be noted, as to the third set of pull rollers, that they are driven from above-from the gear 46 to the gear 43 on the upper pull roller shaft to the gear 45 connected to the lower pull roller shaft; that the lower, or female, slotting roller 50, which is adjustable, is driven by way of gear 52 from the gear 5| of the upper, or male, slotting roller, and that, as pointed out, the creasing rollers are driven from above from the gear 51 to the gear 56 on the upper scoring roller 55, and that the lower scoring roller 62 is driven from gear 56 by way of the gear 60, and in each instance where a roller or cylinder is adjustable-there is no load on any of the shafts which drive the adjustable rollers, except that incident to the driving of the particular roller to which the shaft is directly connected, as shown in detail in Figures 2 and 3.

Referring particularly to Figures 2 and 3, which will be treated as illustrating the shafts and driving connections of the second set ofpull rollers 28 and 32, but which also illustrate the drive and adjustment of all the adjustable rollers and cylinders, the shaft 3| of the lower pull roller is made in two sections 3| integral with the roller 32, and 3|" on which the gear 30, which drivesthe roller 32 is mounted. The shaft section 3|, which carries roller 32, both already identifled, is shown as mounted in anti-friction bearlugs 69 and 18, carried eccentrically in circular carriers 65 and 66, which rotate in suitable-circular seats, 61 and '68, in the side frames l and 2 respectively. The carriers 65 and 66 project beyond the frames and are provided with toothed gears 1| and 12, which mesh with gears 13 and 14 on an adjusting shaft 15, by which the eccentrics are rotated to move the shaft section 3|, and the roller 32 thereon, up and down, toward and away from the upper pull rollers 26; thus both ends of the shaft section 3| and both ends of the roller 32, are adjusted equally and simultaneously, the outer end of the shaft 15 being, for this purpose, most conveniently provided with a square end, as shown in Fig. 1, to be engaged by a crank, or wrench.

Each roller shaft section 3|, it being" the intent to apply this single description to the shaft and adjustment of each adjustable roller and cylinder, including rollers ill', 32, M, 50 and 62, andto cylinders 26 and 39, is provided with a hub 98 keyed thereto at 9!. This hub carries, as shown, two rollers 92 which are shown as mounted to rotate about axes parallel to the shaft 3| and spaced outwardly from the centre of said shaft on opposite sides. The rollers. are for antifriction purposes, and pins, or the like, may be substituted. As shown, the end of the hub 96, adjacent bearing l0 may rotate in the circular aperture 93 in eccentric carrier 66.

The gear 36 which drives roller-32 is shown as mounted on the shaft section 3|" about which it rotates freely, being provided with anti-friction bearings 36', the same being also true of the cor responding gears i2, 22, 38, 45, 52 and 60 which drive the adjustable rollers and cylinders already identified. This gear 30 and each of the corresponding gears is provided with a flange or equivalent member 94, which carries outwardly spaced from its axis, rollers, or equivalent elements 95 corresponding to the rollers 92, which rollers 95 in the assembled relation of the parts are shown as located oppositely to each other and with their axes in, or substantially intersecting a diameter of shaft section 3| which, in the preferred arrangement is at or nearly at right angles to the diameter of shaft section 3|, at the ends of which diameter the respective rollers 92, or the equivalent, are mounted. For convenience, the portion of shaft section 3| seated in the bearings 69 and ill in the eccentric carriers 65 and 66 may be referred to hereinafter as journals, and bearings 69 and ill, as journal bearings.

The shaft section 3|" is shown as having a reduced end portion 96, which is secured in a cap 8 by means of a nut 91 threaded on to its outer end 97', the cap 3 being in turn seated in the cover plate-2, which is shown in elevation in the foreground in Figure 1. Cap 4 is held against rotation by bolts 4'.

The shaft section 3|" is shown as stationary, the alignment of the gear 36 being best maintained in this way. To complete the driving connection between the gear 36 and the shaft section 3|, which with'its roller 32, the same being true of the other adjustable rollers and cylinders, moves up and down, or toward and from the pressure roller 28 as the adjustment is operated, the axis of the gear 30, and its shaft, being stationary, a floating plate 91 is provided. This plate 91 is not directly connected either to the gear or to the shaft section 3| but is in=driving relation to both. Member 91 is also referred to as a block.

To maintain the desired driving relation between the gear 30, and the shaft section 3i, the plate 91 is provided with four slots, or seats, 98, 99, I00 and IN. While the plate 91, as shown, is capable of being assembled in various relations with the rollers, the respective slots and rollers will be identified for convenience in the relation shown. The members of all the pairs of rollers and cylinders described are parallel to each other, and it is desirable or essential to maintain this parallelism.

As shown, the rollers 92, which are mounted on the hub 90, which is keyed to shaft section 3i, are seated in the slots I00, IOI, which are diametrically opposite, or substantially so, and

radially arranged, being spaced outwardly from the centre of the plate 91, and the rollers 95, mounted on the flange 94 of the gear 30, are seated in the slots 98 and 99, which are also diametrically opposite, or substantially so, and radially arranged and spaced outwardly from the centre of the plate and in the form shown, which is at present regarded as the preferred form, the diameter on which slots 90 and 99 are located is at right angles to the diameter on which the slots I00 and I05 are located, and the relation of the pairs of slots to each other determines the relations of the respective pairs of rollers in the assembled relation.

In the construction shown, the gean 30 is driven from the gear 21, which is driven in uniform ratio, and at substantially constant speeds from the gear II on the lower front pressure roll, and the shaft section 3! or, more particu- Q larly, journals 300, which are integral with the pressure roll 32, are driven in uniform angular relation to and with said gear 30, without regard to the exact alignment of the shaft section 3| with the shaft section 3I" and the axis of the gear 30. This uniform angular relation is maintained through an adjustment of the shaft section 3| and the roller 92 which is sumcient to compensate for the maximum variation in thickness between the different materials, 1. e. different thicknesses of blanks used in this type of machine; it being understood that the axis of gear 30, is coincident as to its direction with the axis of roller 32 and this relation is maintained at all times throughout the various adustments. At times the axes are aligned, and, at all other times, parallel. The eccentric bearing supports, 65 and 69, are moved simultaneously and in uniform relation, maintaining the coincidence of direction above recited, by means of the gears 19 and H on the adjusting shaft l5, meshing with the gears II and I2 on the eccentric bearing supports 85 and 99 as already described.

The shaft 15, in each instance, is held in adjusted position, as shown in Figure 1, by means of a split collar I02 formed integrally with a cap I03 secured to the cover plate 2' by means of bolts, or the like, as shown.

The shaft I5 is clamped, and the bearings of the adjustable roller, or cylinder, are held in adjusted position in the form shown by means is likewise secured by means of bolts 4, or in any suitable manner, as shown, such details being matters of designing, and of comparatively little tion, or coupling member employed, the samebeing indicated in a general way by reference character I05 operates satisfactorily under the load incident to the driving of the single pressure roller, it operates in a less satisfactory manher when an excess load is applied, and in this connection the arrangement shown in Figure 1, whereby the adjustable rolls are, in each instance, at the end of an individual train of driving gears, is of importance, as this arrangement limits the load on each such driving connection, or coupling I05 to the torque necessary to drive the single roller 32, or a corresponding adjustable roller or cylinder, as already identified. In this way, excess friction losses and the tendency to cramping and failure due to overloading of the connection, are overcome.

In Figure 4 I have shown fragmentarily the reciprocating feed by which single blanks are fed to the printing and slotting mechanism at high speeds, combining with the front pressure, or pull rollers I0 and I0 to accelerate them from no speed to speeds approaching 1000 ft. per minute.

To this end the crankgear 6 carries a crank .pin block I 01, which slides in the rocking lever I00 pivoted at J09. This rocking lever I08 operates a wrist pin IIO on the end of connecting rod III. This connecting rod operates one or more horizontally sliding bars H2, provided at the outer ends with fingers H4, NS, for engaging the front edge of each bottom blank in turn of the pack II". The parts I 01 to H2 are essentially heavy and reciprocate at high speed approaching the linear speed mentioned, and constitute an important agency contributing to the destruction of the side frames when weakened by slotting. As the high stresses referred to, including those due to vibrations from this and other sources, seem unavoidable, development of a construction whereby the harmful weakness of the frame is avoided without the use of an excess of material, and a quick, exact and dependable adjustment of the rollers and cylinders is attained without disturbing the parallelism, the drive, or the uniformity of angular relations, is believed to be an important accomplishment.

I have thus described a printer .slotter, embodying the features of my invention in the preferred form, the description being specific and in detail in order that the manner of construct ing, applying and using the invention may be fully understood; however, the specific terms herein are used descriptively rather than in a limiting sense, the scope of the invention being defined in the claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a printer slotter for making printed and slotted box blanks of corrugated board and the like from plain blanks, the machine being adapted to successively feed individual plain blanks, and to accelerate them to high operating speeds, said machine having a reciprocating feed, pairs said transmitting means carry only the load.

of cooperating rotating members comprising parallel pull rollers exerting suitable feeding pressures and pairs of cooperating parallel printing and impression cylinders, slotting rollers and the like, means whereby one member of some of said pairs is mounted in adjustment and is adjusted toward and from the other member of said pair I comprising journals at the opposite ends of said adjustable member, the said printer slotter having continuous side frames with rotary carriers one for each of the journals of each said adjustable member mounted in circular seats in said side frames, a bearing for each said journal eccentrically mounted in the corresponding carrier, adjusting means for rotating the carriers for each adjustable member, equally and simultaneously, to move the same toward and from its cooperating member, maintaining the parallelism of the cooperating pairs of rotary members, a drive gear for each said adjustable member supported with its axis stationary and disposed in the same direction asand in approximate alignment with the axis of said adjustable member, means for driving each said drive gear at substantially constant and uniformly related speeds and means for transmitting torque and motion from the drive gear to thecorresponding roller, or cylinder, and maintaining a uniform angular relation between each said gear and its corresponding roller, or 'cylinder, in all positions of adjustment.

2. In a printer slotter for making printed and slotted box blanks of corrugated board and the like from plain blanks, the machine being adapted to successively feed indlvidualplain blanks, and to accelerate them to high operating speeds, said machine having a reciprocating feed and pairs of rotary members comprising cooperating parallel pull rollers exerting suitable feeding pressures and pairs of cooperating parallel printing and impression cylinders, slotting rollers and the like, means whereby one member of some of said pairs is mounted for adjustment and is adjusted toward and from the other member of said pair comprising journals at the opposite ends of each said adjustable member, the printer slotter having continuous side frames rotary carriers, one for each journal of each adjustable member mounted in said side frames, each carrier having a bearing for the corresponding journal eccentrically mounted therein, adjusting means for rotating the carriers for each adjustable member, to move the same equally and simultaneously toward and from the cooperating member of the pair, maintaining the parallelism of the coop erating members of the pair, a drive gear for each said adjustable member, supported with its axis stationary and disposed in the same direction as and in approximate alignment with the axis of its driven member, means for rotating each said drive gear at substantially constant speed and means for transmitting torque and motion from each drive gear to its corresponding driven member, and maintaining a uniform angular relation between each said gear and its corresponding member, said transmitting means comprising a floating block, free to move radially relatively to both the drive gear and said member, and substantially positive means for transmitting torque from said gear to'said floating block and from said floating block to said adjustable roller, or cylinder, the means for rotating the said drive gears and all the remaining cylinders and rollers comprising a train of gears, alllocatedononesideofthemachine,whereby to operate its said driven member. 3. In a printer slotter for printing and slotting corruga d board and the like in the manufacture of printed and slottedv box blanks, adapted to feed individual blanks, and to accelerate them to high operating speeds, said machine having pairs of cooperating rotary members comprising pairs oi. parallel pull rollers exerting suitable feeding pressures and pairs of parallel printing f and impression cylinders, slotting rollers and the like, means whereby one of each of several of said pairs is mounted for adjustment and is adjusted, each said adjustable member having journals at its opposite ends, said printer slotter having continuous side frames a pair of rotary carriers for each adjustable member mounted in said side frames, each carrier having ajournal bearing for one said journal eccentrlcally mounted therein, adjusting means for rotating the carriers of each adjustable member, equally and simultaneously to move the same toward and from its cooperating member of the pair,'main-' taining the parallelism of the cooperating pairs of members, a drive gear for each said adjustable member, said gear having its axis disposed in the same direction as the axis of said member, said gear being mounted with its axis stationary, and

in approximate alignment with the axis of said adjustable member, means for driving each said drive gear at substantially constant speed and means for transmitting torque and motion from the drive gear to the corresponding member,

maintaining a uniform angular relation between each said gear and its driven member, the means for driving said drive gear for each adjustable member comprising a separate driving connection at the driven end of which said member is located whereby the means for transmitting torque and motion from the drive gear to the corresponding roller, or cylinder, carries substantially no load other than the torque required to operate the said adjustable member.

4. In a printer slotter for corrugated board and similar box blanks having pairs of rotary members comprising pull rollers, printing cylinders and slotting rollers and the like between the members of which pairs the blanks are passed under pressure, the members of each pair being arranged in parallel, said printer slotter having continuous side irames means whereby one member of some or said pairs is mounted for adjustment and is adjusted toward and from the other member of said pair, comprising a pair of rotary carriers for each adjustable member mounted in circular seats in said side frames, bearings eccentrically arranged on each said carrier rotatively supporting the opposite ends of said adjustable members, a drive gear for each adjustable member mounted to rotate with its axis stationary, and in approximate alignment with the axis of its corresponding driven member, means for rotating the eccentric carriers for each adjustable member simultaneously moving the bearings and the member carried thereby toward and from the other member of the pair, maintaining the parallelism of the members of the pair, means for transmitting the torque and motion from the drive gear to its said corresponding member maintaining the angular relation between the gear and said corresponding member constant.

. 5. In a printer slotter for corrugated board and similar box blanks having pairs of rotary members comprising pull rollers, printing cylinders and slotting rollers and the like between t justment and is adjusted toward and from the other member of said pair, comprising a pair of rotary carriers for each adjustable member,

mounted in circular seats in said side frames bearings eccentrically-arranged on each said carrier rotatively supporting the opposite ends of said adjustable members, a drive gear for each adjustable member mounted to rotate with its axis stationary, and in. approximate alignment with the axis of its corresponding driven member, means for rotating the eccentric carriers for each adjustable member simultaneously moving the bearings and the member carried thereby toward and from the other member of the pair, maintaining the parallelism of the members of the pair, means for transmitting the torque and motion from the drive gear to its said corresponding member maintaining the angular relation between the gear and said corresponding member constant, the machine having a gear train for operating all said drive gears from a single source, said gear train comprising a separate train of gears driving the drive gear for each adjustable roller or cylinder, the drive gear for the adjustable member being at the end of said train.

6. In a printer slotter for corrugated board and similar box blanks having continuous sidei'rames, pairs of rotary members comprising pull rollers, printing cylinders and slotting rollers and the like between the members of which pairs the blanks are passed under pressure, the members of each pair being arranged in parallel, means whereby one member of some of said pairs is mounted for adjustment and is adjusted toward and from the other member of said pair, comprising a pair of rotary carriers for each adjustable member, rotatively mounted in said side frames, bearings eccentrically arranged on each said carrier rotatively supporting the opposite ends of said adjustable members, a drive gear 50 alignment with the axis of its corresponding driven member, means for rotating the eccentric carriers for each adjustable member simultaneously moving the bearings and the member carrled thereby toward and from the other member of the pair, maintaining the parallelism of the members of the pair, means for transmitting the torque and motion from the driven gear to its said corresponding member maintaining the angular relation between the gear and said corresponding member constant, the machine having a gear train for operating all said drive gears from a single source, said gear train being all on one side of the machine and comprising a separate train oi gears driving the drive gear for each adjustable roller or cylinder, the drive gear for the adjustable member being at the end of saidtrain.

I. In a printenslotter for corrugated board and similar box blanks having pairs of rotary members comprising pull rollers, printing cylinders and slotting rollers and the like between the members of which pairs the blanks are passed under pressure, the members of each pair being arranged in parallel, means whereby one member of some of said pairs is mounted for adjustment and is adjusted'toward and from the other member of said pair, comprising a pair of rotary carriers for each adjustable member, bearings eccentrically arranged on each said carrier rotatively supporting the opposite ends of said adjustable members, a drive gear for each adjustable member mounted to rotate with its axis stationary, and in approximate alignment with the axis of its corresponding driven member, means for rotating the eccentric carriers for each adjustable member simultaneously moving the bearings and the member carried thereby toward and from the other member of the pair, maintaining the parallelism of the members of the pair, means for transmitting the torque and motion from the drive gear to its said corresponding member maintaining the angular relation between the gear and said corresponding member constant, said drive gear having a stationary shaft section on which it-rotates, the machine having a cover plate and a cap on which said shaft section is rigidly supported, secured to said cover plate.

HENRY B, GREENWOOD. 

